Blow-off cock.



BLOWuOFF COCK.

APPLICAWM 'F1 STAES Pllflillll OFFICE. sMirH, or Bassens, infirmes,` 'AssIGN'on or ONE-HALF To SAMUEL H. JONES, or Pensons, KANSAS'.

'snow-UFF come' normal;

" To all whama'fzf may. concern.'

I Be it known @that I, 'FRANK SMITH, Ea olt'zen of the United States, and aresident of Parsons, in theconnty of'Labetteand.;

Stute of Kansas, 'have invented a new and useful improvement in BlowJOi Cocks, of

which the following is a specification. My .present invention relates fto blow-olf cocks, `my object-being to provide a construction which will eileotigvely perform the functions usually incident to blow-oil .cocks without :the necessity of ground-joints vand other parts which ordinarilyV :require 'frequent and careful machining.

Broadly, the improvements incident to my prescrit invention reside in the provision of a hollow valve stem carrying a valve member adapted :tor engagement with a seat located within the valve-casing below its inlet, the' lower portion `of the valve stem :being 'provided with apertures through wallancl .being surrounded by a stuffing box,

.formed within Athe casing below its said` seat and .including a `gland and certain other parts by which the gland may be ad- Y jjusted from the exterior of the casing with` out requiring the removal Yof other parts.

With the above in mind, I have 'shown the practical embodiment of my invention inthe accompanying draw-ing, which formst apart of this specification, and 1n which- Figure l 1s a side elevation of .my 1m-- proved blow-oil cock. Fig. 2 is a transverse vertical section taken therethrough. Lig. 3 is a `horizontal section taken therethrough substantially on the line 3-3 of Fig. 2, and Fig. l a perspective view of the valve stem removed. f

Referring now to these figures. the casing A is provided with an internally threaded side opening a for connection with the inlet pipe. and has an upper Stuliing box A threaded in connection with the top thereof and removable therefrom. At a point below its before mentioned side inlet opening a, the easing A. is provided with an inwardly projecting circular rib a which forms a valve seat, and the lower end of the casing is provided with side extensions a? from which project the threaded studs b adapted to extend through side projections b of the lower discharge fitting B, for the purpose of removably locking said discharge fitting in position adjacent said lower casing end Specification olflLetters Patent. Patented Aug, 19,1913. f Appoation 4filedSeptemluerL2., 1-9-12. .Serial No. 718,252. l

'The lower portion of the casing A provided with -a 'stuffing box which consists of packing 'c disposed in the space immediately` gbelow its valve seat a and adjustably comin the space between the lower endof lth'ecasi'ng and the upper end'of the discharge fitting B.

Mounted vertlcally through the casing is, the valve-stem D, the upper. endet which'- is provided with a removable slottedp-mem.-

ber ,:and thelower portion of whichis proL vided with a circular series of apertures d.

which communicate with its Ylongitudinal bore as -clearly indicated in Figs. 2 and 3. Intermedia-te lits ends, and at apoixtt abovethe series of apertures d', the valve stem is provided with a circular lian e d2, constivtilting a valve andadapted, w en fthe-valve.' -is closed, to rest upon the valve seat af Vof the casing, substantially in the '.poz'siti'on!` shown in F ig. 2.

An -operating lever E has fan interniediatl 'i pivotal connection 'with 'the upper-slot stem member d ort the valve stem, antlssro vided with :a handle e .at oneendf'alnd Sie" pivotally connected at e" at its opposite end, to the upper .end of .a generally vertical'linieA F, the latter of which vis in turn pivoted 'at' its lower end, at tto a projection a3 of the casing A. Thus, in order to openthe valve when inthe position shown in F ig. 2, it is necessary to raise the lever E and thus raise the valve stem D, to a point wherein the apertures d of the valve stein extend above 'the valve seat a of the casing, whereby the fluid may pass into thecasing throughl its inlet a and through the stem openings df and thence through the bore of the valve stem and downwardly through tlie'discharge fitting B.

It will be noted that the-discharge tittiu B is nonrotatably connected.y to the casing 'y and is provided with an inwardly extending lug b2 which slidably fits within a vertical f slot c2 inthe lower ortion of the adjpstable gland C, whereby t e latter will be prevented from rotation and thus forced .to move longitudinally when its adjusting ring c',

which is provided with peripheral apertures,

is rotated, for instance byua Spanner wrench, from the exterior of the casing. 1t will be further noted that this' construction clearly obviales thc necessity o'f ground-joints or other parts requiring frequent. cleaningand careful machinii'ig, and may be. readily maintained in a non-leaking condition by infrequent adjustment of the gland C.

It should be understood that the valve stein and packing o surrounding the Valve stern constitutes the main closure means, and that the valve (Z2 and seat a are supplemental thereto and may be dispensed with entirely. So long` as the openings d of the. valve Stem are disposed within or below the packing c, and the gland C properly adjusted, there can be nolcak.

I claim :f

l. A blow oil" cock comprising a casing `formed in upper and lower portions, the

latter of which is open at its lower end, and the former of which is provided with a side opening, a hollow stein operating in the casing and having openings in its wall,'a stuffing box arranged in the upper casing portion below its side opening and surrounding the saidstein, said stuffing box embodying an adjustableglaml, and a nut rotatable in the space between the casing portions, said nut being accessible from the exterior.of

the casing and having threaded engagement with the gland, and means whereby toprevent rotation ot' the gland and cause longitudinal -morcment thereof when the nut 1srotated. y

2. A blow-off cock comprising a casing having a side inlet and a valve seat below the inlet, and further provided with a lower i discharge portion secured in spaced relation thereto, a hollow stem operating in the casing and having an intermediate member constituting a valve for engagement with the casing seat, and also having Aopenings through its wall below itssaid valve member, a stuliing box arranged in the casing,

below its seat and surrounding the lower portion of the said stem, said stutiing box embodying an adjustable gland, and a nut rotatable in the space between the casing and its spaced lower discharge portion, said nut being accessible from the exterior of the casing and engaging the said gland for the' purpose of ad]usting the latter.

3. A blow-off cock comprising a casing having a side inlet and a valve seat below the inlet, and also provided with a lower dis-` gland, and a nut rotatable in the space ad jacent the discharge portion and having internal threads engaging the exterior of the gland, and adapted upon its rotation to affect an adjustment of the gland.

.FRANK H. lsistrrn.l

Witnesses:

O. C. HOLMES, GEO. YOUNG.' 

